<template>
	<view class="container">
		<!-- 空白页 -->
		<view v-if="mEmpty===true" class="empty">
			<image src="/static/img/emptyCart.png" mode="aspectFit"></image>
			<view class="empty-tips">
				空空如也
				<view class="navigator" @click="toIndex">随便逛逛></view>
			</view>
		</view>
		<view v-else>
			<!-- 列表 -->
			<view class="cart-list">
				<block v-for="(item, index) in cartList" :key="item.id">
					<view
						class="cart-item" 
						:class="{'b-b': index!==cartList.length-1}"
					>
						<view class="image-wrapper">
							<image :src="item.image" 
								:class="[item.loaded]"
								mode="aspectFill" 
								lazy-load 
								@load="onImageLoad('cartList', index)" 
								@error="onImageError('cartList', index)"
							></image>
							<view 
								class="yticon icon-xuanzhong2 checkbox"
								:class="{checked: item.checked}"
								@click="check('item', index)"
							></view>
						</view>
						<view class="item-right">
							<text class="clamp title">{{item.title}}</text>
							<text class="attr">{{item.attr_val}}</text>
							<text class="price">¥{{item.price}}</text>
							<uni-number-box 
								class="step"
								:min="1" 
								:max="parseInt(item.stock)"
								:value="parseInt(item.number)>parseInt(item.stock)?parseInt(item.stock):parseInt(item.number)"
								:isMax="parseInt(item.number)>=parseInt(item.stock)?true:false"
								:isMin="parseInt(item.number)===1"
								:index="index"
								@eventChange="numberChange"
							></uni-number-box>
						</view>
						<text class="del-btn yticon icon-fork" @click="deleteCartItem(index)"></text>
					</view>
				</block>
			</view>
			<!-- 底部菜单栏 -->
			<view class="action-section">
				<view class="checkbox">
					<image 
						:src="allChecked?'/static/img/selected.png':'/static/img/select.png'" 
						mode="aspectFit"
						@click="check('all')"
					></image>
					<view class="clear-btn" :class="{show: allChecked}" @click="clearCart">
						清空
					</view>
				</view>
				<view class="total-box">
					<text class="price">¥{{total}}</text>
					<text class="coupon">
						不含运费
						
					</text>
				</view>
				<button v-if="hasLogin==false" @tap="oauth('weixin')" open-type="getUserInfo" @getuserinfo="mpGetUserInfo" type="primary" class="no-border confirm-btn">去结算</button>
				<button v-else type="primary" class="no-border confirm-btn" @click="createOrder">去结算</button>
				
			</view>
		</view>
	</view>
</template>

<script>
	import myCloud from '@/common/util/cloud.js';
	import util from '@/common/util/util.js';
	import {
		mapState,
		mapMutations
	} from 'vuex';
	import uniNumberBox from '@/components/zx-ui/zx-number-box/zx-number-box.vue'
	export default {
		components: {
			uniNumberBox
		},
		data() {
			return {
				total: 0, //总价格
				allChecked: false, //全选状态  true|false
				empty: false, //空白页现实  true|false
				cartList: [],
				mEmpty:false,
				expressState:0
			};
		},
		created() {
			this.loadData();
		},
		watch:{
			//显示空白页
			cartList(e){
				let empty = e.length === 0 ? true: false;
				if(this.empty !== empty){
					this.empty = empty;
				}
			}
		},
		computed:{
			...mapState(['hasLogin','userId'])
		},
		methods: {
			...mapMutations(['login', 'setUserInfo']),
			//请求数据
			async loadData(){
				let cartInfo = uni.getStorageSync('cart_info');
				if(cartInfo){
					this.cartList = JSON.parse(cartInfo)
					console.log(this.cartList)
				}else{
					this.mEmpty = true;
					console.log(123)
				}
				// let list = await this.$api.json('cartList'); 
				// let cartList = list.map(item=>{
				// 	item.checked = true;
				// 	return item;
				// });
				// this.cartList = cartList;
				this.calcTotal();  //计算总价
			},
			//监听image加载完成
			onImageLoad(key, index) {
				this.$set(this[key][index], 'loaded', 'loaded');
			},
			//监听image加载失败
			onImageError(key, index) {
				this[key][index].image = '/static/img/errorImage.jpg';
			},
			navToLogin(){
				uni.navigateTo({
					url: '/pages/public/login'
				})
			},
			 //选中状态处理
			check(type, index){
				if(type === 'item'){
					this.cartList[index].checked = !this.cartList[index].checked;
				}else{
					const checked = !this.allChecked
					const list = this.cartList;
					list.forEach(item=>{
						item.checked = checked;
					})
					this.allChecked = checked;
				}
				this.calcTotal(type);
			},
			//数量
			numberChange(data){
				this.cartList[data.index].number = data.number;
				this.calcTotal();
				uni.removeStorageSync('cart_info');
				uni.setStorageSync('cart_info', JSON.stringify(this.cartList));
			},
			//删除
			deleteCartItem(index){
				let list = this.cartList;
				let row = list[index];
				let id = row.id;

				this.cartList.splice(index, 1);
				this.calcTotal();
				uni.removeStorageSync('cart_info');
				if(this.cartList.length>0){
					uni.setStorageSync('cart_info', JSON.stringify(this.cartList));
				}else{
					this.mEmpty = true;
				}
				
				uni.hideLoading();
			},
			//清空
			clearCart(){
				uni.showModal({
					content: '清空购物车？',
					success: (e)=>{
						if(e.confirm){
							this.cartList = [];
							uni.removeStorageSync('cart_info');
							this.mEmpty = true;
						}
					}
				})
			},
			//计算总价
			calcTotal(){
				let list = this.cartList;
				if(list.length === 0){
					this.empty = true;
					return;
				}
				let total = 0;
				let checked = true;
				list.forEach(item=>{
					if(item.checked === true){
						total += item.price * item.number;
					}else if(checked === true){
						checked = false;
					}
				})
				this.allChecked = checked;
				this.total = Number(total.toFixed(2));
			},
			//创建订单
			createOrder(){
				let list = this.cartList;
				let goodsData = [];
				let tmpValue = '';
				let tmpIndex = 2;
				let tmpIsReturn = false; 
				this.expressState = 2;  //默认
				list.forEach(item=>{
					if(item.checked){
						if(item.delivery.length==1){  // 有一次数据就显示  包含的意思  公有
							if(item.delivery[0]=='快递发货'){
								this.expressState = 0
							}
							if(item.delivery[0]=='到店自提'){
								this.expressState = 1
							}
						}
						
						if(tmpValue!=this.expressState){
							if(tmpValue==0&&this.expressState==1){
								tmpIsReturn = true;
							}
							if(tmpValue==1&&this.expressState==0){
								tmpIsReturn = true;
							}
							if(tmpValue>this.expressState){
								tmpValue = this.expressState;
							}
						}
						
					}
				})
				if(tmpIsReturn==true){
					this.$api.msg('所选商品快递方式不一致，需单独购买');
					return;
				}
				list.forEach(item=>{
					if(item.checked){
						goodsData.push(item);
						this.cartList = this.removeAaary(this.cartList,item)
					}
				})
				uni.removeStorageSync('cart_info');
				if(this.cartList.length>0){
					uni.setStorageSync('cart_info', JSON.stringify(this.cartList));
				}else{
					this.mEmpty = true;
				}
				uni.navigateTo({
					url: `/pages/order/order-create?data=${JSON.stringify({
						goodsData: goodsData,
						totalPrice: this.total,
						expressState: this.expressState
					})}`
				})
			},
			toIndex(){
				uni.reLaunch({
				    url: '/pages/index/index'
				});
			},
			toLogin() {
				// #ifdef H5 
				if (!this.hasLogin) {
					uni.navigateTo({
						url: '/pages/public/login'
					})
				}
				// #endif
			},
			removeAaary(_arr, _obj) {
			    var length = _arr.length;
			    for (var i = 0; i < length; i++) {
			        if (_arr[i] == _obj) {
			            if (i == 0) {
			                _arr.shift(); //删除并返回数组的第一个元素
			                return _arr;
			            }
			            else if (i == length - 1) {
			                _arr.pop();  //删除并返回数组的最后一个元素
			                return _arr;
			            }
			            else {
			                _arr.splice(i, 1); //删除下标为i的元素
			                return _arr;
			            }
			        }
			    }
			},
			mpGetUserInfo(result) {
				if(this.userId!=''){
					if (result.detail.errMsg !== 'getUserInfo:ok') {
						uni.showModal({
							title: '获取用户信息失败',
							content: '错误原因' + result.detail.errMsg,
							showCancel: false
						});
						return;
					}
					const data = {
						uid: this.userId,
						userInfo: result.detail.userInfo
					}
					updateUser(data).then(res=>{
						
					})
					uni.setStorageSync('userInfo', result.detail.userInfo)
					this.setUserInfo(result.detail.userInfo)
				}
			},
			oauth(v) {
				var that = this;
				uni.login({
					provider: v,
					success: function(loginRes) {
						const data = {
							code: loginRes.code
						}
						wxLogin(data).then(res=>{
							that.$api.msg(res.msg);
							if (res.code == 0) {
								const data2 = {
									uid: res.uid,
									field: ['mobile']
								}
								getUserInfo(data2).then(res2=>{
									if (res2.code == 0) {
										if (res2.userInfo.mobile == undefined) {
											res.mobile = ''
										} else {
											res.mobile = res2.userInfo.mobile
										}
										uni.setStorageSync('userId', res.uid)
										uni.setStorageSync("userName",res.mobile);
										uni.setStorageSync('uniIdToken', res.token)
										uni.setStorageSync('uni_id_token_expired', res.tokenExpired)
										that.login(res)
									}
								})
							}
						})
					}
				});
			},
		}
	}
</script>

<style lang='scss'>
	/*
		全局公共样式和字体图标
	*/
	@font-face {
		font-family: yticon;
		font-weight: normal;
		font-style: normal;
		src: url('https://at.alicdn.com/t/font_1078604_w4kpxh0rafi.ttf') format('truetype');
	}
	
	.yticon {
		font-family: "yticon" !important;
		font-size: 16px;
		font-style: normal;
		-webkit-font-smoothing: antialiased;
		-moz-osx-font-smoothing: grayscale;
	}
	
	
	
	
	view,
	scroll-view,
	swiper,
	swiper-item,
	cover-view,
	cover-image,
	icon,
	text,
	rich-text,
	progress,
	button,
	checkbox,
	form,
	input,
	label,
	radio,
	slider,
	switch,
	textarea,
	navigator,
	audio,
	camera,
	image,
	video {
		box-sizing: border-box;
	}
	/* 骨架屏替代方案 */
	.Skeleton {
		background: #f3f3f3;
		padding: 20upx 0;
		border-radius: 8upx;
	}
	
	/* 图片载入替代方案 */
	.image-wrapper {
		font-size: 0;
		background: #f3f3f3;
		border-radius: 4px;
	
		image {
			width: 100%;
			height: 100%;
			transition: .6s;
			opacity: 0;
	
			&.loaded {
				opacity: 1;
			}
		}
	}
	
	.clamp {
		overflow: hidden;
		text-overflow: ellipsis;
		white-space: nowrap;
		display: block;
	}
	
	.common-hover {
		background: #f5f5f5;
	}
	
	/* button样式改写 */
	uni-button,
	button {
		height: 80upx;
		line-height: 80upx;
		font-size: $font-lg + 2upx;
		font-weight: normal;
	
		&.no-border:before,
		&.no-border:after {
			border: 0;
		}
	}
	
	uni-button[type=default],
	button[type=default] {
		color: $font-color-dark;
	}
	
	/* input 样式 */
	.input-placeholder {
		color: #999999;
	}
	
	.placeholder {
		color: #999999;
	}
	.container{
		/* 空白页 */
		.empty{
			position:fixed;
			left: 0;
			top:0;
			width: 100%;
			height: 100vh;
			padding-bottom:100upx;
			display:flex;
			justify-content: center;
			flex-direction: column;
			align-items:center;
			/* background: #fff; */
			image{
				width: 240upx;
				height: 160upx;
				margin-bottom:30upx;
			}
			.empty-tips{
				display:flex;
				font-size: $font-sm+2upx;
				color: $font-color-disabled;
				.navigator{
					color: $zx-color-primary;
					margin-left: 16upx;
				}
			}
		}
	}
	/* 购物车列表项 */
	.cart-item{
		display:flex;
		position:relative;
		padding:30upx 40upx;
		.image-wrapper{
			width: 230upx;
			height: 230upx;
			flex-shrink: 0;
			position:relative;
			image{
				border-radius:8upx;
			}
		}
		.checkbox{
			position:absolute;
			left:-16upx;
			top: -16upx;
			z-index: 8;
			font-size: 44upx;
			line-height: 1;
			padding: 4upx;
			color: $font-color-disabled;
			background:#fff;
			border-radius: 50px;
		}
		.item-right{
			display:flex;
			flex-direction: column;
			flex: 1;
			overflow: hidden;
			position:relative;
			padding-left: 30upx;
			.title,.price{
				font-size:$font-base + 2upx;
				color: $font-color-dark;
				height: 40upx;
				line-height: 40upx;
			}
			.attr{
				font-size: $font-sm + 2upx;
				color: $font-color-light;
				height: 50upx;
				line-height: 50upx;
			}
			.price{
				height: 50upx;
				line-height:50upx;
			}
		}
		.del-btn{
			padding:4upx 10upx;
			font-size:34upx; 
			height: 50upx;
			color: $font-color-light;
		}
	}
	/* 底部栏 */
	.action-section{
		margin-bottom:56px;
		position:fixed;
		left: 30upx;
		bottom:30upx;
		z-index: 95;
		display: flex;
		align-items: center;
		width: 690upx;
		height: 100upx;
		padding: 0 30upx;
		background: rgba(255,255,255,.9);
		box-shadow: 0 0 20upx 0 rgba(0,0,0,.5);
		border-radius: 16upx;
		.checkbox{
			height:52upx;
			position:relative;
			image{
				width: 52upx;
				height: 100%;
				position:relative;
				z-index: 5;
			}
		}
		.clear-btn{
			position:absolute;
			left: 26upx;
			top: 0;
			z-index: 4;
			width: 0;
			height: 52upx;
			line-height: 52upx;
			padding-left: 38upx;
			font-size: $font-base;
			color: #fff;
			background: $font-color-disabled;
			border-radius:0 50px 50px 0;
			opacity: 0;
			transition: .2s;
			&.show{
				opacity: 1;
				width: 120upx;
			}
		}
		.total-box{
			flex: 1;
			display:flex;
			flex-direction: column;
			text-align:right;
			padding-right: 40upx;
			.price{
				font-size: $font-lg;
				color: $font-color-dark;
			}
			.coupon{
				font-size: $font-sm;
				color: $font-color-light;
				text{
					color: $font-color-dark;
				}
			}
		}
		.confirm-btn{
			padding: 0 38upx;
			margin: 0;
			border-radius: 100px;
			height: 76upx;
			line-height: 76upx;
			font-size: $font-base + 2upx;
			background: $uni-color-primary;
			box-shadow: 1px 2px 5px rgba(217, 60, 93, 0.72)
		}
	}
	/* 复选框选中状态 */
	.action-section .checkbox.checked,
	.cart-item .checkbox.checked{
		color: $uni-color-primary;
	}
</style>